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Circuit Editor Interface

Learn how to use LeafSheep QVU's circuit editor effectively.

Editor Layout​

Overview of the editor interface showing main components

The editor is divided into five main sections:

Circuit Canvas (Center)​

  • Main workspace for building circuits
  • Qubit lines shown horizontally
  • Time flows left to right
Circuit canvas

Gate Palette (Left)​

  • Contains all available quantum gates

    Gate palette

Console Panel (Right)​

  • Simulation controls
  • Configuration options
Console panel

Results Panel (Bottom)​

  • Results display
  • Exports the results to a csv file.

See Running Simulations for interpreting results.

Results panel

Code Display (Right)​

  • Displays the code for creating the circuit with qiskit
Code display

Managing Qubits​

Adding and Removing Qubits​

  • Click '+' on bottom of the circuit canvas to add a new qubit
  • Click '-' on the left side of each qubit line to remove the qubit and the gates on it.
  • Maximum of 10 qubits allowed
note

Qubits are numbered from top to bottom, starting at 0.

Working with Gates​

Adding Gates​

  1. Select a gate from the palette
  2. Drag it onto a qubit line
  3. Gates snap to grid automatically
  4. Release to place the gate

See Quantum Gates

Removing Gates​

  • Click on the gate and press the delete or backspace key on your keyboard.
  • All controls will be removed if the gate is removed.

Adding Controls​

For gates that support controls:

  1. Hover over the placed gate
  2. Click and drag from the control point (top and bottom of the gate)
  3. Drop on target qubit line

Removing Controls​

  • Click on the control point and press the delete or backspace key on your keyboard.
note

Check the quantum gates documentation to see which gates support controls.

Setting Parameters​

For parameterized gates:

  1. Select the gate
  2. Hover to open parameter panel
  3. Enter values (-2 to 2, multiplied by π)

See Quantum Gates for more information.

Screenshot showing gate parameter panel with input field

Circuit Operations​

Basic Controls​

  • Undo: Ctrl+Z (Cmd+Z on Mac)
  • Redo: Ctrl+Y (Cmd+Y on Mac)
  • Save: Ctrl+S (Cmd+S on Mac)

Validation​

The editor automatically checks for:

  • Invalid gate combinations
  • Incorrect control connections
  • Parameter range violations
tip

Watch for warning indicators that appear when circuit issues are detected.